Thanks for the quick response. I've been messing around with playing as Z and P lately. Now I see that T is pretty darn overpowered. I'm still trying to get a good starting build going and figuring out a good strategy to use against other races.

I switched from P in the beta to Z in retail and I don't regret it. I don't think balance is that much of an issue at my amateur level of play, since most games are decided by me or the opponent messing up anyway. If you want to pick up Zerg this should be a good place to take a look at some builds. Personally, I try to go with 14 gas/ 13 Pool as often as I manage to based on scouting and positions, as I feel that pulling of one order decently is enough for plat league at the moment.